NPHS has a Factory-Built ADU Financing Program working with a local manufacturer.
You can read about the program here:
Avrame provides many A frame kits at many sizes:
You can read their website here:
Cutting Edge Homes: Website
S2a Modular Llc: Website
Silver Creek Industries, Inc. Website
US Modular Inc. Website
AmCo Structures Website
Plant Prefab Website
Back Porch Homes: Website
LifeArk Modular (GDS Innovation Lab): Website
SafeHuts™: Website
Connect Homes: Website